Remove a radiation counter from Nuclear Fallout: Nuclear Fallout deals 1 damage to each creature and each player. Creatures dealt damage this way can't be regenerated this turn. Activate this ability only once per turn, as a sorcery.
"I am become death, destroyer of worlds."
I assume this is for Challenge # 030. Very compelling and flavourful take on the idea!
Like Alex said, this is excellently flavorful.